Photo by JEFFREY HASTINGS State police troopers working at the scene of the fatal motorcycle crash Friday morning on the Circumferential Highway. (Photo by JEFFREY HASTINGS)

NASHUA — As friends and family of 41-year-old Hudson resident Neil Doiron mourn his death in a single-vehicle motorcycle crash, state police continue their investigation into the incident.

Doiron, a former Nashua resident, was operating a 2014 Harley Davidson FLHSX ST west on the Circumferential Highway when it went off the left side of the ramp to the Daniel Webster Highway, according to police.

Troopers arriving at the scene found Doiron pinned under the motorcycle, and determined that he had sustained fatal injuries, police said.

Also responding to the scene were Nashua police, firefighters and medical personnel with AMR ambulance.

The crash occurred shortly before 4 a.m. Friday, police said.

The ramp was closed to traffic for about 2 1/2 hours, police said, as troopers conducted an on-scene investigation.

Police said all aspects of the crash remain under investigation, and they ask anyone who may have witnessed it to contact Trooper Edward Perciballi at Edward.Perciballi@dos.nh.gov or 223-6172.

Dean Shalhoup may be reached at 594-1256 or dshalhoup@nashuatelegraph.com.